package main

import "fmt"


func modify(map1 map[int]int) {
	map1[10] = 900
}


func main() {

	map1 := make(map[int]int, 2)
	map1[1] = 90
	map1[2] = 88
	map1[10] = 1
	map1[20] = 2

	modify(map1)
	fmt.Println(map1)


}